Three hours before a start against Florida, Colorado Rockies pitcher Jason Jennings sits in front of his locker, puts on his headphones and stares at his video iPod...He isn't watching the latest Coldplay video or catching up on an episode of "Alias" as a way to relax before the game. Jennings is doing some last-minute cramming: The Rockies' video staff has downloaded every Marlins hitter into his iPod, and Jennings is figuring out how to pitch to them. He watches frames of himself delivering the pitch, followed by the result of the play. Everything else is weeded out...